Tabulating machine



May

2, 1939. J. w, BRYCE TABULATING MACHINE Filed O01?. 25, 1935 lO Sheets-Sheet l 177 0000/ ooooo/ 79 ooooo '83 eeeeeeeeeaeaaseeee 3 B 7 6 3 II l2 I3 ucl.

LCL.

INVENTOR ATTORNEY lMay 2, 1939. 1 w; BRYCE TABULATING MACHINE Filed oct. 25,

1933 1o sheets-sheet 2 ATTORNEY May 2; 1939- J. w. BRYCE 2,156,969

TABULATING MACHINE Filed Oct. 25, 1933 lO Sheets-Sheet 3 R v V 33 42 FIGA.

'INVENTOR ATTORNEY J. w4 BRYcE .2,156,969

TABULATING MACHINE Filed oct. 25, 1933 1o 'sheets-sheet 4 May 2, 1939.

lNvENToR Mgg/ZW A ATTORNEY May 2, 1939- J. w- BRYCE 2,156,969

TABULTING MACHINE Filed oet. 25,1953 1o sheets-sheet 5 I FIGJ.

'ATTORNEY May 2, 1939. J. w. BRYCE 2,156,969

TABULAT ING` MACHINE Filed Oct. 25, 1935 lO Sheets-Sheet 6 INVENTOR W wf ATTORN EY May 2, 1939. L w BRYCE 2,156,969

TABULATING MACHINE .Filed Oct; 25, 1933 10 Sheets-Sheet 7 Flam.

|91 A-rroRNEY May 2, 1939.

F IG.

Filed Oct. 25, 1933 l0 Sheets-Sheet 8 lOlb , ATTORNEY J. W. BRYCE May 2, 1939.

TABULATING MACHINE y Filed Oct. 25, 1935 lO` Sheets-Sheet 9 @d MBE 'Patented May 2, 1939 James Bryce, Bloomfield,

N. J., assigner to International Business Machines Corporation, New York, N. Y., va corporation of New York Application october 25, 193s, serial No. 695,091

16 Claims.

This l,invention relates to accounting machines y and moreparticularly to accounting machines of the record controlled type.

The principal object of the vide an accumulating mechanism for tabulating machines of improved form and selectivity of operation whereby computing may be effected with greater efficiency, accuracy, and speed than heretofore and in which the number of moving parts is considerably less than in previous accumulating mechanisms. A more specific object is to provide an improved form of electromagnetic 'accumulator inwhich the 'accumulating element comprises an armature 'adapted forv rotation under control of a pair of alternately established magnetic fields fand inwhich the entry of an amount 'in each denominational order is' e'iected by repeated alternation in the direction Vin which thepair of go magnetic elds is established. Y

A further object is to'provide an electromagnetically operated accumulator in which the several denominational orders are mechanically independent of one another and in which improved transfer mechanism is provided for carrying from one order to the next higher order.V

'A further object of the invention is to provideA an improved subtracting accumulator in which the amount to be subtracted is entered additively 3o in its complementary value.

Various other objects andfadvantages of the invention will be obvious from the following particular description of. two forms of mechanism embodying the'invention or from an inspection $5 of the accompanying drawings; and the invention alsoconstitutes certain new and novel features of construction and combination of parts hereinafter set forth and claimed.

In the drawings:

i 40 Flg.' 1 is a general assemblyview'of the machine, showing lthe location'and arrangement of the several units. p

Fig. 2 is a'time chart of thetiming of electrical devices of the machine.

4I' Fig. 3 is a central section through the card feeding and analyzing unit of the machine. The section is taken'substantially along the lines 3-3 of Fig. 1.

Fig.'3a is a d tail of the start and stop keys.

50 Fig.' 4 is a section taken along lines 4-4 of Fig. l, showing the 'driving connectionsfor the card feeding' an'd analyzing unit.

Fig. 5 is a central section of the printing mechanism of the machine taken'substantialiy along Il the lines 6--5 of Fig. l.

invention is to prothe (Cl. 23S-61.8)

Fig. 6 is a timing diagram of the modified form 'of the invention. I

Fig. 7 is a detail View of one of the denominar. tional order units of the accumulating mechanism, the section being taken substantially along 5 lines 1-1 of Fig. 1.

Fig. 8 is a plan elevation partly in section of a Vnumber of denominational orders of the accumulator mechanism.

Fig. 9 is a sectional view taken along the lines 10 9--9 of Fig. 7, showing the arrangement and construction of one of the accumulating units.

. Figs.. 10, 11, 12,- and 13 are sectional views taken on Fig. 9 as indicated thereon.

Figs. 14 and 14a, placed side by. side, constitute 15 a wiring diagram of the electric circuits of the machine.

Fig. 15 shows a modified form of the invention', disclosing key entry devices for controlling the '-Fig. 18 is a wiring 4diagram of the electric circuits of the noded form of the invention.'

General arrangement The several main units of the machine are arranged as shown in Fig. 1 with the vcard feedl ing ,and` analyzing unit at the left through which record cards are fed singly past analyzing brushes which sense the data represented by difierentially located perforations. The printing inechanism is located adjacentl to the card feeding unit and is adapted to be controlled by the c'ircuits completed'through the card perforations to record in printed form the signicance yofy the perforations analyzed. The accumulating units 40 are located to the right of the printing unit andeach comprises a'number of individual adding units. These accumulating units are preferably arranged in groups of ve adding units and two such groups are shown mounted upon the main frame of the machine. They have no mechanical connection with the remainder of the machine l and may accordingly be located in any position with respect to the. rest of the mechanism. If desired, they may be placed at a point remote from the machineA proper and as many units may be employedas is consistent with the character of the work to be performed by the machine.

Beneath the printing and accumulating units is Vthe -plugboard provided with suitable plug 5l sockets through which the 'several units may be coordinated in accordance with the requirements of the work to be performed.

.Driving system Energy for driving'the mechanical devices of the machine is supplied 'b'ya motor M (Fig. 1) which has belt and pulley connection I9 (see also Fig. 3) with a shaft II. Mounted on shaft II is a gear I2 meshingwith a. gear I3 which is integral with a 'clutch driving member I4 freely mounted upbnshaft I5. Secured to theshaft I5 is an arm I6 which carries a spring-pressed clutching dog I1 normally held in position as shown in Fig. 3 by clutch releasing azrm I8 pivoted lat I9 and controlled in its operation by a.

magnet 20. Energization of magnet 20 will open contacts 20a and will rock arm I8 in a counterclockwise direction to release dog I1 for engagement with clutch driving member I4 and thereafter shaft I5 will rotate with gear I3` until magnet 20 is deenergized and lever-I8 consequently causes disengagement of the clutch connection.

zine roller.

In Fig. 4,.shaft I5 is provided'with a gear 2l by means of which the card feeding and analyzing unit of the machine is operated. This 'unit will be described in further detail hereinafter.

The shaft I'I extends through the card' feeding unit to the printing mechanism and carries a gear 22 (Fig.5) which,through idlers 23, drives a fgear 24 freely rotatable on shaft 25. A clutch driving member 26 is integral with gear 24 and cooperates with a spring-pressed clutching dog 21 carried by an arm 28 secured to shaft 25. Arm 25 and dog 21 are retained in the position shown in Flg.\5 by arm 29 pivoted at 30. Arm 29 is controlled by magnet 3l which, upon energization, will rock the arm 29 in a counterclockwise direction to release arm 28 and dog 21 forl engagement by ber 26.

It will thus be apparent that both the card feeding unit and the printing unit may be connected. through their respective clutching mechanisms with the main vdriving shaft I I of the machine so that the card feeding unit may operate independently of the printing unit and vice versa.

Card feeding and analyzing mechanism When the card feeding unit is clutched to the main drive shaft II, the record cards R are fed downwardly one by one from the supply maga- 32 by a reciprocating picker knife 33 which advances the lower or leading edge of the card to a pair of feed rollers 34 which thereafter advance it past `a set of upper brushes UB to furthe latter with driving memther sets of feed rollers 35 which continue the card 'downwardly past a lower set of analyzing brushes LB after which feed rollers 36'advance the card to stacker mechanism, generally designated 31,i for depositfupon discharge stack 38. The stacker comprisesa drum 39 provided with a` number of spring-pressed, pivoted card receiving clips 40 which are adapted to successively engage a stationary cam roller 4I as the clips pass the same; This action takes place as the leading edge of the card approaches the drum and.

is timed so that the leading edge is grippedby the clip as it moves out of engagement with the In Fig. 4 is shown the driving mechanism for the picker 33 and the severalsets of Vfeed rollers. The former is carried by. a crosshead 42 ,which has link connection with an eccentric Printing mechanism The printing mechanism is shown in Fig. 5 and is driven, as explained above, from shaft 25 which carries a box cam 48. A follower roller 49 controlled by the cam groove is carried by an arm 50 and causes oscillation of a shaft 5I. Secured to shaft 5I is a pair of arms 52 which have link connection .53 to a vertically slidable crosshead 54 which, when the card feeding unit and printling unit are both in operation, will reciprocate once for each card fed through the feedingv mechanism. Slidably mounted on cross-head are type carriers 55 normally held in the position shown in Fig. 5 by spring-pressed arms 56. As the crosshead moves upwardly, arms 56 will urge type carriers 55 to follow and type elements 51 will be successively presented to the printing platen 58. Each type carrier is provided with a number of ratchet shaped teeth 59 which cooperate with spring-pressed stopping dog 60 normally held in the position shown by a latch 6I which is connected through a c'all wire 62 to the L-shaped armature 63 of print magnet 64, there being a magnet and connecting mechanism for each type carrier. Magnet 64 may be energized at differential times during the upward movement of the type carriers and such energization will cause latch 6I to release pawl 66 for engagement with lone of the teeth 59, thereby interrupting further 4upward movement of the associated carrier without interfering with the invariable movement of thel crosshead.

VA printing hammer 65 isV provided for each type carrier and as the latter are moving upwardly, the hammers are retracted, that is, permittedto rock in a counterclockwise direction.

At the end of the upward stroke of the crosshead after the several type carriers have been positioned, the type hammers are foroeably rocked in a clockwise direction against the positioned type elements to take an impression there-v from. 'I'he mechanism for operating the type hammers comprises a bail' 66 pivoted at 61 and having link connection 66l with a member 69 pivoted at 1n. Arm sz has pivotea nfereto at 1| ,a member 12 whose free end engages an arm of member 69 and causes the latter to rock in a clockwise direction against the action of its spring 13 as the crosshead 54 rises. Near the upward extremity of the movement of crosshead 54, a pin 14 in member 12 will engagea xed stop 15 -to cause the free end o'f the member 12 to release dog 69 whereupon spring 13 will return member 69 to its normal pomtion 'and'through llink 68 swing bail 66 and'hammers 65 rapidly in a clockwise direction to effect printing.

The card feeding, analyzing, and the printing Aumulatm mechanism The accumulating mechanism, whose construction and manner of operation constitute the main novelty of the invention, will now be explained in detail with particular reference to its organization, after which the circuit diagram will be explained to point out the manner in which the accumulating mechanism is coordinated with the card feeding and printing units.

The accumulating unit,I as hereinbefore stated, comprises a plurality of individual denominational orders which have no mechanical connection with one another and since all orders are identical in their structural organization a detailed description of one will suffice for all.

The mechanism foreach unit is mounted upon a supporting plate (Figs. '1, 8' and 9). Supported upon the plate 15 are pairs of magnets 18 and 11 whose pole pieces 18 are arranged circumferentially about an arbor 19 as shown in Figs. 7 and l0, Securedato arbor 19 and lying in' the plane ofthe pole pieces 18 is a toothed rotor 80 provided with ten teeth 8| of like configuration. The relationship of the parts is such that when two dlametrically opposed teeth 8| of rotor 80 lie on the common center line of one pair of pole pieces 18, the common center line of the other pair of pole pieces 18 will lie across the space between the pairs of teeth 8| immediately adjacent the other pair of pole pieces 18. This arrangement is illustrated at an enlarged scale in Fig. 10 and the operation is such that if a'magnetic field is established between the pair of pole pieces lying in the vertical-plane, the rotor will be `advanced a halftooth space tol centralize the rotor in the field. If now a magnetic field is established be-l tween the pole pieces lying inthe horizontal plane and the first field is dissipated, rotor 8| will advance another half tooth, or one-twentieth of'a revolution. In this manner, successive, alternate energization of the pairs of magnets 16 and 11 will cause a progressive'step-by-step advance of the rotor and the rateof advance will depend upon the rapidity with which the magnetic fields are alternated.

Referring to Fig. 9, arbor 19 is mounted for rotation in the forward bracket 82 and a rear. bearing 83. Immediately adjacent to the latter bearing is provided a device for preventing retr o-\ grade movement of the rotor which comprises a\ plurality of balls 8| (see also Fig. 13) l whichvare disposed between a lgroove in arbor 19 and cam surfaces 85 arranged in the bearing block 83. Springs 88 normally urge the balls in the direction indicated in Fig. 13 and serve to prevent clockwise rotation of the arbor 19 as viewed in this figure. a

In operation a magnetic field is normally established between the horizontal pole pieces. 18 and tends to hold the rotor in the position shown in dotted outline in Fig. 10. The rotor serves as an accumulating element and each tenth of a revolution constitutes an entry of 1. Thus, if a1 is to be entered, the normally eilective horizontal magnetic eld is dissipated and the vertical eld establishedto advance therotor a twentieth of a revolution. The field then reverts to its original horizontal direction advancing the rotor another twentieth of a revolution. The inertia of rotor 80 will cause an overthrow represented by the y difference between its full and dotted line positions. This overthrow will bring the rotor iniothe next magnetic field for continued advance in the same direction, andi! the next eld is not established, the spring pressed balls 8| of Fig. 13 will prevent return of the rotor from its advanced position. Thus, to enter one unit, the rotor is advanced one tooth from its initial dotted line position where it is held by' the horizontal magnetic field tending to draw it clockwise. To enter a 6, the directionv of the eld is changed twelve times to eect twelve successive steps ofmovementto the rotor. The'manner in which the direction of the field is alternated and the horizontal field maintained to hold the rotor in its new position will be more fully set forth in connection with the'description of the circuit 'diagram. It may be mentioned that the rotor is initially set in its dotted line position, and is held there-byffrictional contact of the related parts, so that the rotor will advance immediately upon establishment of the vertical field.

The arrangement for advancing an accumulating element in the form of a rotor,such as 80, has Abeen experimentally operated at a rate of speed in excess of 6400 increments of advance per minute.

At this rate, data can be entered into` the accumulating element from 200 cards per minute in a positive and eiicient manner with the hor- /izontal magnetic field holding therotor in displaced'position and the balls 84 preventing any retrograde movement of the parts.`

Carried by arbor 19 (Fig. 11) is a brush 81 which is advanced therewith and which may occupy any of the ten positions in which the rotor may beheld. Arranged circumferentially about arbor'1 9 is a cylinder 88 in which are embedded a plurality of contact segments 89,'one for each of the positions which brush 81 may occupy and with which the brush makes contact when in the corresponding positions. Brush 81 and segments 89 are provided for the purpose of taking a reading from the accumulating element during total printing operations of the machine and the manner in which this is effected will be set forth in detail in connection with the circuit diagram.

Also mounted upon arbor 19 and insulated therefrom by means of a sleeve 90 is a pair of electrically connected brushes 9| one o f whose functions is to provide an additional carrying impulse to the next higher denominational order when the order with which they are associated passes through zero and embedded in the cylinder 88 are pairs of convcomprising acomplete accumulator of five dea nominational orders. A common casing surrounds each group of ve orders as shown in Figs. 1 and 8 and in the casing are mounted fivemulti-contact relays- 99, v'|00, |0I., |02, and |03, w -`ch control contacts associatenwith the lfive accumulator units of a particular group.

Miscellaneous Contactv devices Referring to Figs. 1 and 4, shaft Il carries a gear |04 which, through an idler |05, drives a. gear |08 mounted-upona shaft A |01 which in In the plane of brushes 9| tact-segments 92 and 93, so located that when the turn, through gears Illirives ashaft |09. Upon shafts |01 and |03 are mounted the various cam l controlled contact devices prefixed CR in the drawings and impulse distributors whose function will be-described in connection with the circuit diagram and whose timing is illustrated in lthe timing diagram in Fig. 2. This and other contact devices are designated in Fig. 2 to show their relative timing, the dark stripes representing the period inthe cycle when the contacts are closed. A gear secured to shaft |01 drives g a gear mounted upon a shaft ||2 which in turn carries a pair of electrically connected brushes. |13. insulated from the shaft. brushes H3 serve to connect insulated contact segments 4 successively with a common arcuate conducting sector IIS. By virtue of the gear connection just described, shafts |01, |03 and ||2 are rotatable constantly as long as the motor M is in operation.

In Figs. 1 and 4, shaft I5 is provided with cam contact devices which, since shaft I5 is in operation only during card feeding operations, operate the contact devices only at such times. These del vices are preixed F in the drawings.

f start and stop key construction in which the key to the left is the start'key, which upon depression rik will close contacts STa and STb. The stop key, upon operation, will open contacts Sp and will at the same time Vbe latched in open position by aspring-pressed pivoted latch l i6. AContacts Sp will be held open thereby until a subsequent operation of the start key which will permit the stop key contacts to close at the time the start key contacts are closed.

Circuit diagram 'I'he circuit diagram (Figs. 14 and 14a) will now.

be'explained in detail and the coordination of the various units will be explained in connection therewith. Current is Supplied to main lines fand |2| from a suitable source S on closure of vn iain line switch |22. Immediately upon closure if switch |22 current will ow from source S to |23,.motor M, wire |24, line |20, to source S. This will result in the operation of the shafts |01, |03 and ||2 in Fig. 4 and the various cam controlled contact devices will operate.J

^ single' cable.

In order to make the circuit diagram more lreadily understandable, the circuit connections of the accumulator itself are confined to Fig. 14a

l`and thevcontrolling circuits of the machine proper I which include the and printing circuits are shown on Fig. 14. The connections shown by short dotted lines betweenthe gin'es indicates thatthe accumulator'may be electrically connected to the main part of the machine and these individual connections may be gathered into a Various relays and associated contacts are shown on both ilgures of the circuit diagram. For better identification, the contacts operated by the relays are designated with the same vreference numeral as the Vrelated relay, followed by a lower Plugging mancuerna-Before placing the malator. will be traced later. Further connections, as |29 The' chine in operation, plug wire connections are made as follows: A plug connection (Fig. 14) is made between each lower brush socket of columns of a card whose data it is desired to list, and a plug socket |26. T'his connection select-s a particular print magnet 64 for recording the data in the selected column.

Where data are to be accumulated a plug connection |21 is made from each column to a plug socket |28 (Fig. 14a) which is associated with one of the denominational orders of the accumu- The circuits through these connections (Fig. 14)r are made between plug sockets |30 of the accumulator read-out mechanism and sockets |3| to direct the reading out of totals from the accumulator to certain selected print magnets 64.

With the cards placed in the supply magazine the machine is ready to commence feeding of cards. Depression of the start key at this time will close its contacts STa (Fig. 14) and a circuit will be completed from Asource S,4 line |20,- wire |24, contacts STa, contacts CRI, contacts P2, contacts |32a of relay magnet |32, magnet |35. wire |33, contacts |3411 of relay magnet |34, wire |23 to source S. Energization of relay magnet |35 will close its points |35a. and |35b, the former of which provide a holding circuit for the magnet, traceable from wire |23, relay contacts |341), wire |33, magnet |35, contacts |350., stop key contacts SP, contacts CRS, Wire |24, to line |20. Closure of contacts |35b completes the circuit through the lcard feeding clutch magnet 20 from wire |23, magnet 20, contacts |3512, wire |36, contacts CB2, Wire |24, to line |20. With the card feedclutch engaged, the rst card will feed downwardly past the upper brushes and cause closure of card lever contacts UCL which immediately complete a circuit from line |2|,contacts-UCL, relay magnet |31, wire |24, to line |20. Magnet |31 will close its contactsv 31a through which current is supplied to the upper brush contact roller. Magnet |31 will also close its contacts |31'c which short circuit the cam contacts CR3 and maintain the circuit between the stop key contacts SP and wire |24'as long as cards are passing the upper brushes.

As the card feeds downwardly, past the lower brushes, the lower card lever contacts LCL are closed, completing a circuit from wire |23, contacts LCL, relay magnet |38, wire |24, to line |20.

Magnet |38 closes its contacts |30a, |3811, |38c,

|381* and |38g and opens its contacts |38d and |38e which perform various controlling functions as will be pointed out hereinafter. Contacts |331: control the supply of current to the common contact roller of the lower brushes.

If the machine is to list, switch |39 is closed and the print clutch magnet 3| will have been energized concurrently with the card feed clutch magnet 20, the circuit being traced from wire |23, magnet 3|, contacts 34d, contacts Illf, switch |39) contacts |3512, wire |36, contacts CB2,

wire |24,"to line |20. In this manner the printing Y mechanism -operates in unison with the card feeding so'that as cards feed downwardly past the lower brushes, circuits will be completed for listing and accumulating.

`Listing circuit- A representative listing cir cuit may be traced asl follows: from line |20, wire` |24, lbrushes '|40 of impulse distributor D3, wire |4|, contacts |30b now closed, lowerbrush contact roller, perforation in the record card, lower brush LB, lower.v brush plug socket |2la, plug conn tionA |25, socket |26,` normally closed conl'Iii Aand. D2 (Fig. 14)

Vto the printing platen.

Adding circuit-A representative adding circuit will now be traced. This circuit is the same as that traced for listing except that at the lower brush plug socket |25a it runs through the plug connection |21 to socket |20 (Fig. 14a) and thence through wire 343 through contacts ||a of the denominational order associated with the connected socket |26, contacts 99o, relay magnet 95, wire |43 (see also Fig. 14), contacts |30g (now closed under control of the lower card lever contacts) wire |44, wire |23, to source S.

The eifect of the completion of this circuit is to energize relay magnet 95 and shift its contacts from the position shown in Fig. 14a. The contacts 95d control the holding circuit for the accumulating mechanism to maintain the accumulating element in position. 'Ihis circuit is established immediately upon closure of the main line switch |22 (Fig. 14) and is traceable from source S, line |2|, wire |45 (Fig. 14a), contacts 95d, magnets 11 in all orders, line |20, back to source S.

As explained above, energization of magnets 11 establishes the horizontal magnetic field and the maintenance of this field through the circuit just traced will holdA the accumulating element in position. However, upon energization of relay magnet 95 under control of a perforation in a record column, this holding circuit will be broken and magnets 16 and 11 will be connected to a pair of impulse distributors or emitters DI which are adapted to emit a series 'of alternating impulses any or all of 'which may be impressed upon the magnets 16 and 11 under control of the relay magnet 95. Impulse distributor DI will iirst complete a circuit from line |2| (Fig. 14), distributor 14), contacts 95h, magnets 16 to line |20. This impulse, as explained above, will advance the accumulating element a twentieth of a revolution. Immediately thereafter impulse distributor D2 will complete a circuit from line |2| (Fig. 14), distributor D2, wire |41 (Fig. 14a), contactsr 95C, magnets 11 to line |20. The circuit through magnets 16 is broken at the same time so that the accumulating element is now advanced another twentieth of a revolution and a full step of movement is recorded. In this manner the distributorsvDl and D2 alternate in their control of the pairs of magnets 16 and 11 to eil'ect the step-by-step advance cf the accumulatingl element.

Reference to the timing diagram (Fig. 2) will show the timing of the impulses emitted by the distributors DI ,and D2 and it will be apparent that if magnet 95 is energized under control of a perforation in the 9 index point position of the record card that the distributors will each emit nine impulses to advance the accumulating element nine steps, while if the relay magnet 95 is energized under control of a perforation in the index point position that only the five impulses of each of the distributors subsequent to the 5 point in the cycle of the machine will be`effective for actuation of the accumulating element.'

Since the initial energizing vcircuit of magnet 05 is momentary, it-is necessary to provide `a card is passing the lower essary entering impulses. been made in the accumulating element, magnet DI, wire |46 (Fig.V

holding circuit established therefor and whenever holding circuit therefo Contacts CRM and` CRIS (Fig. 14) are closed during the reading Y portion of the machine cycle and serve to complete a circuitv from line |20, wire |40, contacts CR|4 and CR|5 to wire 4|49 (Fig. 14a), contacts 99e, contacts 95a, magnet 95, wire |43 (Fig. 14), contacts |389, wire |44, wire |23, to line |2|.

' Magnet 95 having been energized at a differential time during the cycle will be kept energized Vfor the remainder of the entering portion of `the cycle to permit the transmissionl of the'nec- After an entry has 95 will become deenergized and the initial holding circuit through contacts 95d will again be completed to hold the accumulating element in its displaced position until magnet 95 is again energized during a subsequent cycle.

In this manner, items read from the successively fed record cards as they move in transit past the lower brushesLB may be printed or added, or both and this listing andv accumulating will continue until the'supply of cards is exhausted or until the automatic control mechanism, which is yet to be explained, causes interruptionin machine operation for the purpose of permitting total printing operations to take place.

Carrying-1n diierent denominational orders in which entries have been made which aggregate ten or more, the contact brushes 9| (Fig.

14a) will have passed or will rest upon the zero A contact segments 92 of the cylinder 88 at the end of the entering portion of the cycle. Assuming that the brushes 9| in the hundreds order in Fig. 14a pass through "9 during the entering portion of the cycle, at the time of passing a circuit will be completed as follows: from line |2|V (Fig. 14), impulse distributor D4, wire |50 (Fig. 14a), normally closed relay contacts |03a, wire |5I, 9 segment 03 in the hundreds order,

, brushes 9| in dotted position, second "9 segment' 93, coil of double wound relay 98, wire Y |52, to line |20. This circuit is completed during the entering porition of the cycle whenever the accumulating element is on or reaches the .9 position.

' Energization of coil 90 will attract' and close its contacts 98a, 98h and 98o of which contacts 90a provide a holding circuit for the imagnet, which is traceable from line |2| (Fig. 14), wire |45 (Fig. 14a), wire |53, right hand winding of magnet 50, contacts 98a,wire |4,wire |55, wire |56 (Fig. 14), constantly running cam contacts CRIB, wire |4 0, to line |20. Contacts CRIB remain closed throughout the entering portion of the cycle until the carrying operations have been completed when they open to drop the holding circuit.

If the brush 0| makes contact between the zero segments 92 after having passed the 9 segments 83 and establish the circuits just traced, further circuits will be setup which may be traced from line |2| (Fig. 14), impulse distributor D5, wire 356, relay contacts 90b of the hundreds order, for example (how closed), zerosegments `I2 and brushes 9| of such order, left hand coil o1.' magnet 91, wire |52,- to line |20. Magnet 51 will close its contacts 91a, 91h and will open contacts 51e and 91d. Contacts 91a will set up a holding circuit for the relay magnet traceable from line 2| (Fig. 14) wire |45 (Fig. 14a), wire |53, hand winding of magnet l1, contacts 51a, wires |54, |55, and |56, cam contacts CRI., wire |40 to line |20. From the foregoing itwili be apparent that whenever the accumulating element is in 9 position, relay magnet 56 will be energized and a 25 tacts laag, wires m, |23, to une m.

the accumulating element passes through zero, relay magnet 9'| will also be energized and a holding circuit provided therefor.

Let it be assumed that the accumulating element of the hundreds order in Fig. 14a, has successively passed through 9 and "0 during the entering portion of a cycle so that the associated magnets 98 and 91 are energized. Duringv the carrying part of the cycle then, cam contacts CRI9 close to complete a carrying circuit from line |2I (Fig. 14), cam contacts CRIS, wire- |51 (Fig. 14a), transfer relay magnet IOI, wire |52, to line |20. Energization of magnet I| will cause opening of its contacts |0|a and closure of its contacts I 0|b.

Following the closure of contacts CRI 9, closure of contacts CRIB .will establish the transfer circuits as follows: from line |20 (Fig. 14), wire |48, contacts CRI6, wire |58 (Fig. 14a), contacts 9'Ib in the hundreds order, transfer connection wire |59, which may be a plug wire connection if desired; contacts |0Ib of the thousands order, contacts 99c,'and magnet 95 also of the thousands order; wire |43 (Fig. 14), card lever relay con- As before; energization of relay magnet 95 will shift its contacts to connect the magnets i6 and 'I1 of the thousands order with the alternating distributors DI and D2 which each emit a single aUimpulse to the magnets 16 and 'Il to cause ad- 40 ing the carry operation, additional circuits willV vance of the accumulating element a single step. It will, of course, be obvious that parallel carrying circuits will be completed through all denominational orders whose accumulating elements pass through zero during the entering portion of the cycle and additional units will be thereby added to the next higher orders.

Provision is made so that if the denominational order receiving the carry is standing at 9 durautomatically be completed to also add l to the next higher order. The operation of these circuits may best be illustrated by assuming that a carry is to take place' from the tens order in Fig. 14a to the hundreds order and that the hundreds'order is standing at 9 in which case its relay magnet 98 will be energized as explained above. 'Ihe carry circuit just traced, which extends through'connection |59 between the hundreds and tens orders, will continue through contacts |0|b of the hundreds order `to energize. the relay magnet 95 as before so that an additional "1 will be entered in the hundreds order.

A branch circuit, however, will continue from contacts |0|b of the hundreds order, through wire |60, contactsv 98a of the hundreds order, contacts 91e (now closed), connection |59 between the hundreds and thousands orders, contacts |0| b of the thousands order, contacts 99e, magnet 9,5 o f the thousands order, wire |43, back to line I 2| as before.

AAs is general in the tabulating art,- record cards* the record card.A This perforation is analyzed by the upper brushes and a circuit completed therethrough conditions the machine for subtracting. A plug connection |6| (Fig. 1'4) is made between the plug socket of the brush UB of the column in which the X perforation is found, and a special plug socket |62, so that upon analysis of the X card, relay magnet |63, wire |24, to line |20.A

Magnet |63 will close its contacts |63a and a circuit will be completed through relay magnet |64 which is connected between lines I2| and |20 as shown. Magnet |64 in turn closes its contacts l 64a to establish a holding circuit for the magnet |64 which is traceable from line |20, Wire |24, contacts CRI I, contacts I64a, magnet |64, Wire |23, to line |2I. Contacts CRiI remain closed until the' end of the cycle, thus maintaining magnet |64 energized for the same period.

After the holding circuit has been established, cam contacts CRI2 close to complete a branch circuit from contacts |6411, contacts CRI2, relay magnet |65, wire |23, to line |2|.- Magnet |65 closes its contacts |65a, |656 and |650. Contacts |65a close to complete a holding circuit for magnet |65 traceable from line |20, wire |24, contacts CRIS, contacts |65a, magnet |65, tc line |2I. Contacts CR|3 remain closed throughout the entering andv carrying portion of the next cycle which is the cycle during which the same card is passing the lower brushes and from which thedata are to be subtractively entered into the accumulating devices.

Closure of contacts |65c will complete a circuit from line 2|, wire |23, wire |66, contacts |650, wire |61 (Fig. 14a), magnet |02, wire |56 (Fig. 14), contacts CRIS, wire |48 to line |20. 'This circuit is completed at the beginning of the cycle during which the card passes the lower brushes and will remain completed throughout the entering and carrying portions of the cycle. Energization of magnet |02 will close its contacts |02a, |02b and will open its contacts |020 for the purpose of controlling circuits to be traced presently. Contacts |6511 (Fig. l14) control a circuit from line |\2|, wir-e423, wire |66, contacts |6517, wire |68, contacts CR20, wire |69 (Fig. 14a), magnet 99, wire |52, to line |20. Contacts 0R20 remain closed throughout the entering portion of the cycle and magnet 99 will consequently remain energized for that period and willmain'- tain its contacts 99a, 99b, 99d closed and its contacts 99e and 99e open.

Contacts |65b (Fig..14) control a further cirof magnet |00 will close its contacts I 00a and a circuitwillvbe completed from line |20, wire V|49, contacts CRI'I (which close momentarily while magnet |00 is energized), wire I||, contacts |0011, contacts 99h (now closed), magnet 95, wire |43, back to line I2I as before. The ener-` gization of magnet 95, as before, shifts its contacts so that impulse distributors DI and D2 emit alternate impulses to the accumulator operating magnets'and'l'l. l A o In this fashion the accumulating elements of all orders are'concurrently advanced and will continue advanc'mg step by step until the perforation inthe record card is sensed by the lower brushes., At such time, a circuit will be com- .pleted through the corresponding order which 4will interrupt further advanceof the accumulating element, the net result being that the element will have advanced an amount corresponding to aisance The operation may best be explained in con nection with a concrete example. Assuming the perforation analyzed to be a 6, the accumulat- .ing operation will accordingly be interrupted after three steps of movement have been effected c under control of the distributors DI and D2 and this will occur at -the 6 point in the cycle of operations. The circuit through the lowerl brushes will follow from line |2|l,'as for adding,

through the brushes and plug connection |21 tosocket |23 (Fig. 14a), thence through wire |43.

contacts ||l2a (now closed), magnet 95, wire |12..

e wire |53, wire |45 (Fig. 14), to line |21. Energiation of relay magnet 96 will open contacts 35h to interrupt the holding circuit of the magnet 95 and further advance of the corresponding accumulator order will-cease. Contacts 35a close' to maintain the holding circuit interrupted through a holding circuit traceable from line I2| (Fig. 14a), wire |45, wire |53, wire |12, magnet 36, contacts 35a, wire |56, contacts CRI3. wire |43, to line |23.

Elusive ana-Magnet |02 when energized also closes an additionalA contact |||2d (Fig. 14a) which controls the entering of the elusive one into theeunits order of the accumulator to complement the value entered in that order to ten. During the carry portion of the cycle a circuit is completed from line (Fig. 14) wire |48, contacts CRIS, wire |53 (Fig. 14a), contacts |02d,

. connection ns, which may be inserted between contacts |32d and anyorder selected as the units' order of the accumulator, contacts Illb of the units order, contacts 93o, magnet 95, to line |2|,

Aas before. Energization of magnet 95 at this time will cause the addition of 1 to the units order in the manner explained above.

Y Group control' mechanism The machine is provided with lso-called group control mechanism which keeps it in opon as long as classification data on succeslsively fed cards remains unchanged. The method of group controlling is well known in the use of tabulatlng machines and will therefore be but briefly described.' Plug connections |16 (Fig. 14) are made between the sockets of upper brushes UB which read the columns of the card in which eiassiilcation or group number isA perforated and plug sockets |11. Plug connections |13 are made between the corresponding sockets at the lower brushes LB and plug sockets |13. With this arrangement, as the cards successively pass the upper and lower brushes, circuits will be eempletedetnr'eugn the nke peforatlons in the several columns to causeenergization of the windings of magnets |30. This causes:closure-v of contacts Illa which under control of cam contacts CR1 provide a holding circuit. for the magnetv |33 by energizing the lower coil thereof. 'Ihe second pairs of-contacts |331 of magnet |33 are connected in series formation and asl long as there is agreement between the cards oompared, all the selected contacts |331) will close during each cycle. Following the entering and analyzing portion4 o! each cycle, cam. contacts CH3 close momentarily to test the series circuit which, if the cards are in agreement, will be completed as follows: From line |23, wire |24, relay magnet |3I, wire |32, contacts CR3, series contacts |3|lb, shunt connection |33 which 'shunts out those columns of the control not being used, to line |2|. If at the time `contacts CRI close one or more of the contacts |33b are open. this circuit will not be completed and contacts Ilia of magnet |3| will therefore he closed.

Shortly after the closing of contacts CB1, a pair of contacts Fi close and will complete a circuit, under conditions of disagreement, which is traceable from line |23, wire |24, contactsFl, contacts |3|a, contacts |33a, magnet |34, wire |23, to line |2I. Contacts |34a provide a holding'circuit for magnet |34 traceable from line |2|, wire |23, magnet |34, contacts |34a, contacts CRS, switch |33, wire |24, to line |20. Contacts CR3 remain closed throughout the next succeeding cycle and magnet |34 will therefore remain energized for the same`period and will open its contacts |34b, |34d, and will close its contacts |34c and |34e. Opening of contacts |34b causes deenergization of magnet |35. Magnet |35 will thereupon open its contacts |3517 and the card' feed clutch'magnet 23 and print clutch magnet 3| will become deenergized and card feeding will cease.4 Closure of contacts |34c will permit reenergization of the printing clutch magnet 3| toward the end ofthe cycle under control ot contacts CB2 so that during the next cycle the printing mechanism will operate without accompani- I ment by the card feeding mechanism. Contacts |34e supply current to the total printing emitter so that the amounts standing in the accumula.- tor may beread therefrom and printed during this cycle.

Total printing y -from-line |23 (Fig. 14), wire |24, contacts |34e,

wire |35, common H5, brushesv H3, wires |34 in succession (Fig. 14a). one of the segments 33,

brush 31, wire |35, connection |23 (Fig. 14), plug socket |3|, contacts |42b (now closed), print magnet 6 4, contacts P3, to line |2|.. Contacts l42b are closed during total printing. operations under control of magnet' |42 which is energized for such period by means of a circuit traceable from magnet |42, wire |31, contacts |34a, contacts CR3, wire |24, to line |23. In this manner` a reading is taken from each. of the denominational orders `of the accumulator. It will be observed that the reading is taken from the accumulator orders without movement of the parts oet the accumul'ctor so that ai'ter"`total printing has taken place, the accumulator is potlened as at the beginning of the total printing operations.

Resettzng that contacts |34b are closed, the closure of con.

tacts PI Will complete a circuit from line |20, wire |24, contacts PI normally closed relay contacts I 90e, card feed clutch magnet contacts 20a (now closed), magnet |32, contacts |34b, wire |23, to line |2|. Magnet |32 will operate its related contacts of which contacts |32c provide a holding circuit for the magnet from line |2|, wire |23, contacts |3412, magnet |32, contacts |32c, contacts CR5, Wire |24, to line |20. Contacts CRS maintain the circuit throughout the resetting op-v erations. Contacts |32e upon closure complete a circuit from line |2|, wire 23, contacts |3242,r

wire |68, contacts CR2I, wire |10 (Fig. 14a), magnet |00, to line |20.

The parallel circuit through contacts CR20 will be completed at the same timercontinuing from wire |68 (Fig. 14), contacts CR20, Wire 69 (Fig.

14a) magnet 99, to wire |20. As before, the concurrent energization of magnets `|00 and 99 will cause the completion of a circuit through magnet 95 which will now be completed as follows: from line |20 (Fig, 14), wire |48, contacts CRI1, wire |1| (Fig. 14a) contacts |08a, contacts 9917,' magnet 95, Wire |43 (Fig. 14), contacts "|3211, wire |23, to line |2|.- Energization of magnet 95 as before will connect the impulse distributors DI and D2 to the entering devices of the accumulator; units and the distributors will emit alternate impulses to the units. The number of impulses which the units will receive will be the amount necessary to advance the units to zero position at which time .magnet 95 will be deenergized. This is effected in the following manner: The holding circuit for magnets 95 are individually traceable from line |2| (Fig. 14), wire |23, contacts |32d, wire |43 (Fig. 14a) magnet 95, contacts 95a, contacts 99d, contacts I 02e, contacts 91d, closed if the unit is not standing in zero position, wire |14, wire |49 (Fig. 14), contacts- CRI4, CR|5 to line |20. It will, of course, be apparent that if the accumulator element is standing' at zero, the contacts 91d will be open and there will be no holding circuit for magnet 95 and it will immediately 'deenergize so that no impulses from the distributors .DI and D2 can be transmittedv to that particular unit and the unit will remain in zero position. The previous closure of contacts |32f (Fig. 14) completed 'a circuit from line |2|,Qwire |23, contacts |32f;

wire Isl (Fig. 14a), magnet los, wire |55,w1rev |56, contacts CR|8, wire |48 to line |20.

Magnet |03 opened its contacts 03a and closed contacts |0311| and also closed a pair of contacts |03c which control the holding circuit for the*V magnet 99. With the various circuits completed as just described, the several units will receive impulses from the distributors DI and D2 and the holding circuits of the magnets 95 are controlled through contacts 91d of the relay magnets 91. As the accumulating element of each order arrives at zero position so that its brushes 9| bridge the segments 92, a circuit will immediately b e completed as follows: from line |2| (Fig. 14), impulse distributor D6, wire |92 (Fig. 14a),l contacts |0317, segments 92, brushes 9|, left hand winding of magnet 91, wire |52, to line |20. Energization of magnet 91 will immediately open its contacts 91d, deenergizing magnet 95 and interrupting the transmission of further impulses to the unit which will therefore remain in zero position. The holding circuit for magnet 91 will be established as before. In this manner the cooperation of `brushes 9| with segments 92 serves the double purpose of preparing transfer circuits during item entering operations of the machine and for controlling the resetting or zeroizing of the accumulating units during resetting opera.- tions.

Restartng 'will close contacts |35b which will energize the card feed clutch magnet circuit and a cycle of operation of the card feed mechanism will take place and will continue as long as group number designations on the succeeding cards are the same.

Progressive total printing Whenever it is desired tohave the machine perform total printing operations without accompanying resetting ofthe accumulators, the switch |83 (Fig. 14) is moved to its dottedfline position and upon the detection by the group control mechanism of a disagreement between successively fed cards, total printing will take place as described above but the resetting cycle of operations will be eliminated. Card feeding and analyzing will resume immediately after the total has been printed under control ,of the accumulators and the data derived from the succeeding group of .cards will be added to thatV already standing in t-he accumulators. The circuits Iinvolved .in bringing 4these conditions about will now bedescribed. Upon a disagreement in the group numbers of successive record cards, the relay magnet. |8| will become deenergized as before and the circuit' through relaymagnet |34 will also be completed in the same manner. Closure of contacts |3411 will now complete a circuit from line 2|, wire |23, magnet |90, switch |83, contacts CR9, contact |34a, contacts |38, I8Ia, and FI, wire V|24, to line |20.

The holding circuit for magnet |34 is traceable from line |2|, wire |23, magnet |34, contacts |34a,

CR9, switch |83, contacts |a, contacts P4,'wire |24, to une |20. Magnet lso wm be hem through a parallel circuit from line |2|, wire |23, magnet |90, contacts |9011, contacts P4, wire |24, to line |20.

As before, energization of magnet |34 will nterrupt further card feeding operations and initiate a cycle of operations of the printing mechanism during which the total standing on the accumulator will be printed asbefore. Toward the end of the printing cycle cam contacts Pl close andacircuit is established from line |20, wire 24, contacts PI, contacts |90b (now closed), contacts |38c (also closed), relay magnet |35, wire |33, contactsv |3422, wire |23, to line |2|. Contacts |34b closed due to the deenergization of magnet |34 upon opening of contacts CRS earlier in the cycle. In this manner magnet |35 is energized near the end of the total printing cycle and will accordingly close its cntacts 3512 to again energize the card feed clutch magnet f lns aisance 2| so that card feeding operations may'take place on the next succeeding cycle. 1

. Last card operation.-Provision is -made for automatically resetting the accumulators under progressive totalprinting conditionsafter the last card has been analyzed. This is brought about by energization of magnet 32 during the last total printing cycle, when contacts PI will complete a circuit from line |20, wire |24, contacts PI, contacts |30b, contacts |38d (now closed, since there is no card at the lower brush station), magnet |32, contacts |3411, wire |23, to line |2|.

Magnet |32, as before, sets up its holding circuit through contacts |32c and CRS and through its several other contacts, conditions lthe circuits for resetting operations. Following this last resetting operation, an additional cycle of operations oi the card feeding mechanism is'initiated as explained above, during which the last card is advanced from beyond the lower brushes to the stacker.

' PRecapitu'latzlon are A brief rsum will. now be given of the entire operation of the machine to point out the sequence in which the various operations take place. Depression of the start key will first cause the machine to perform a resetting cycle of opera. tions tov insure that the accumuiators are clear and in readiness to receive entries. This resetting cycle is brought about upon closure of start key contacts STb which complete a circuit from line |20wire |23, contacts S'Ib, contacts CRI,l contacts |38e (closed since no cards are at either brush station), magnet |32, lwire |33, contacts |3411, wire |23, to line |2|. Magnet |32 in the now familiar manner, causes a resetting cycle of operations to take place. The closure of contacts STa, concurrently with contacts, STb will initiate a card feeding cycle of operations in the manner explained above so that a card is fed from the hopper 32'to the upper brushes while resetting of the accumulators takes place. Following this operation, magnet |35 will again become energized upon closure of contacts CRB and its contacts in turn cause energization of the card feed clutchmagnet 20. Ii' the machine is set for listing with switch |33 closed, print clutch magnet 3| will also become energized after the ilrst card has arrived at the lower brush station.

Y From this point on, entries will be made intoy the accumulator orders and to the printing mechanism from the successive cards, and the group control mechanism will keep the machine in operation as long as the group controlanumbers on the successive cards remain the same.. The cards whose perforations represent positive' values will be directly entered into the accumulators.

Those'whose entries represent negative items will lbe entered in the accumulators i'n their complementary val e.

Upon a change in groupnunber, card feeding will ,be interrupted and a total printing cycle of operations will take place during which the amount standing on the 'accumulator will be- .g printed; Ifthe machine is conditioned for progressive total printing, card feeding operations will then resume and further entries made into T' the accumulators. If the machine is not set for progressive total printing, a resetting cycle of operations will follow after .the total printing ycycle. during which the accumulators will vbe cleared` or zeroixedV and card feeding operations will be resumed after this; resetting cycle. After the supply of cards has 'been exhausted, the machine will automatically print the total standing in-theaccumulators'at that time and then automatically zeroize them.

M odi'cation In FigQisis shown a view of a modified form of the invention in which a keyboard is provided for effecting entries into-the accumulatbrs and in which printing mechanism similar to thatA in the main form of the invention is also provided f for item and total printing purposes.v The accumulating mechanism of the modification is entirely similar to that of the main form.' The modiiication is 4also arranged so that total printing and resetting atake place in the same cycle of operations and for the sake of simplicity, the subtracting' features have been omitted. v

A multi-columnar keyboard is provided with a plurality of columns of keys 200, a motor bar (Fig. 17), sub-total key 202, grand total key 203,

'and a list, non-list lever 204. Keys 200 are adapted to cooperate with the usual spring-pressed latching bar 205 which serves to hold the depressed keys in their lowered positions until the bars 205 are mofved toward the'left under con- V trol of a releasing magnet 203. The lower end of each key 200`carries a. contacting strip 201 insulated from the key and adapted to complete a connection between a denominational order conductor 208 and a digit position conductor 209 so that depression of any key, forexample the 5 key 200, willmake an electrical connection between the harA 203 in which column the key is delpressed and the 5.' bar 209. The 4keys 202 and 203 (Fig. 17) are also provided with a latching bar 205a also operated to unlatch the keys under control of the magnet 206. The printing mechanism is driven in the same manner as that in i the preferred for through mechanism controlled by the main operating shaft 2|0 of the printing mechanism which has loosely mounted thereon a clutch driving member 2|| integral with the gear 2 |2 driven from a gear 2|3 on shaft 2|4 which in turn is driven fron'i the motor M.

Energization of the magnet 2li will operate a -one revolution clutch` mechanism, generally designated 2|3, to couple shaft 2|3 w clutch driving element 2|| for one cycle of operation, during which the type bars will 'rise to print the amount set up on the keyboard. The shaft' 2M carries a number of cam controlled contact devices which will hereinafter be designated with either the preflxCR. or M and these operate'at all times.

The 4operation of the modification may best be explained in connection with the circuitdiagram, Fig. 18. In the diagram, those elements which are ,similar to elements performing the'same functions in the main Yform will be identified vby simllar reference numerals for convenience. Closure of switch |22 will place'the motor M in operation and'hthe shaft4 2|lrwill accordingly rotate constantly. As in the main form, a circuit will also be immedaitely completed through the accumulating magnets 11,through the `contacts d tov hold the accumulating elements in positionand contacts 35D and '33e serve\to connect the'alterthe motor bar 20| is depressedto close contacts z l1 anda circuit wm be completed from source s.. wire 2 Il, contacts 2|',I, relay'magnet 230, wire 220.-

back to source S. Closure of contacts '23M willv Y man; distributors :J1-anfing magnets and .A

then n'old thc'circuit thrcugn'magnet 25| nmdcr control of cam contacts CR22 so that upon closure A are in constant rotation as are the Clicams and` the emitters. Thus when the motor bar 23| is' operated to close contacts 2||, the CR contacts may' be in any position with respect to-the 13" .to take a-sub-total, that is, print the amount position of the time diagram, Fig. 6. For this reason contacts C1222 are provided so that if contacts 2|1are momentarily closed early in any` cycle, the relay 25|! will be held energized until after contacts 0R23 close near the end of the cycle. Of course, the momentary closure of contacts 2| 'l may coincide with the ciosuxeof contacts 0R23 in which case. no holding circuit is necessary, or if the operator holds the contacts 2|1 closed for a period of a cycle the holding circuit can be omitted. Accordingly, upon closure of contacts CR23, near the end of a cycle magnet 2|! will be energized and itvwill close its contacts 2|9a to establish a holding circuit from line 220, relay 2|8, contacts 2|9a, cam contacts 0R24, to line 2i8. Contacts 6R24 continue this Y holding circuit throughout the major part of the next following cycle. Assuming that the machine is set for accumulating only, closure of contacm 2|9c will control a. circuit traceable from source S, wire 2|8, contacts-2|9c, wire 22|, common strip 222, brushes 223, driven from shaft 2|4, and then successively to contact segments 224 which are electrically connected with the diget gars 209.

Assuming the 8 key 200 of the hundreds order to have been depressed, the circuit will continue through the 8 segment 224, 8. bar 223, connector201, hundreds bar 288, wire 225, contacts "la in the hundreds order, contacts 99h, magnet 95, to opposite side of SourceS.v As inthe preferred form, energization of magnet 95 at\a-differential time will cause the emitters D1Y and D8 to advance element an amount proportional to the value of the controllingdgit. Similarcircuitsarethrough the other orders ofthe accumulatorsduring the cycle andnearthe endofacyclatransferring operations will takeplacein thesame manner asinthepreferredform.

Where items are tobe suhtractively entered, thiscanbedonehymanuallysettingupthetens complementofthenumberonthekcyboardand performingastraightaddingoperation.

',Ifthemachineistolisttheentered'itemsa's theyareaccuix'iulated,thelint,noir-lintlcver234A is moved to position-to close contacts 223 whichV will complete a'circmtafter relay 2|! is energized as above, from som'ce S, wire 2li, magnet 221, wire 228, contacts 226, contacts 22|,

contacts 23|, wire 23|, contact 2|3b, wire 22|, tosourceS. Magnet 22'Iwi1lclose'aplm-alityof contacts 221s to connect the several denominational order bars 233 to print msgnetslcone- Spondingtothoseordexs. 'Inadditioncontacts 221| which close along with contacts'22'|a,comV

plete a circuit to the print clutch magnet 2li aspirollowszfrom source '8, wire22l, contacts 2|, contacts 221D, clutch magnet 215, wire 2li to source S.V Y

- withV the completion ofthe adding circuit aparalleldrcuitwilr extend from bar '233, contacts 221s, corresponding print magwith switch .122;

net 64, wire 223, to source S and the-item entered will be printed. During the latter part of the cycle, cam contacts 0R25 will close momental-ily to complete a circuitfrom source S, wire 2|8, contacts 0R24, contacts 2|9a (which provided a holding circuit for relay 2|9), contacts 0R25, key release magnet 206, Wire 22D, to Vsource S,.thereby releasing the key set up. In this manner, items may be successively entered into the accumulator and concurrently printed, if desired.

Sub-total printing.-If at any time it is desired latched down-whereupon contacts 230 will beopen to break the circuit through magnet 221 and contacts 232, 233, and 234 will be closed. Closure of contacts 233 completes acircuit after the motor bar contacts2|`| have been closed and relay 2|9 energized and held, as follows: .from source S, wire 220, contacts 2|9b, wire 23|, contacts 233, magnet 2|5wire 2|8 to source S. The printing mechanism will commence to operate and the following circuit will then be completed: from source S, Wire 221|, contacts 2|9b, wire 23|, contacts 234, contacts M8, wire 235, relay magnet |00, wire 236, to source S. Magnet l'will close its contacts illa. A parallel circuit from contacts 234 vwill Yalso be traceable through contacts M1, wire 231, magnet 99, wire 236, to source Sto energize magnet 39 and close its contacts Ycompleted to theprint magnets 64 at diiferentiai tim to read out amounts standing in theA several orders. Y

Closure of contacts 232 completes a circuit from source S to wire 23| as before, contactsv 2 32, wire 240, relay magnet 24|, wire 236, to source S. Magnet 24| closes contacts 24|b and opens contacts 24|c'. As the brushes 9| of the Vseveral orders rotate through this complete revolution, thu will bridge thezero contact segments l2 as the type elements corresponding to the amounts on the element arrive in printing position and a circuit will be completed in each orderv which istraceable from source S, wire 220, print magnet 64, wire 242, contacts 24 |b, segments l2,

and brush sl, wire 24;, contacts sab, previously Vclosed as the'brushes 3| bridged segments 33 'in the manner explained in connection with the preferred form, wire 244,impulse distributor DII, wire 2|3 to source S.

-Ai'ter this circuit has been completed, the accumulator unit will advance the .remainder of arevolution to occupy the same position it held at thev commencement of the cycle. In otherwords, each accumulatororder-is sent through Va. complete revolution, at diii'erential times during which, the circuitjust traced is completed to print the interrupt the type barin position to amount standing on the element.

Grand t0taI"prnting.-If it is desired to clear the accumulators, the grand total key 243 is depressed to open contacts 223 and cle contacts 245, 24S, 241. and 243. Contacts 241 are 'wired in parallel with contects234 of the sub-total 

